149 lines
4.4 KiB
Nix
149 lines
4.4 KiB
Nix
/* Some functions for manipulating meta attributes, as well as the
|
|
name attribute. */
|
|
|
|
{ lib }:
|
|
|
|
rec {
|
|
|
|
|
|
/* Add to or override the meta attributes of the given
|
|
derivation.
|
|
|
|
Example:
|
|
addMetaAttrs {description = "Bla blah";} somePkg
|
|
*/
|
|
addMetaAttrs = newAttrs: drv:
|
|
drv // { meta = (drv.meta or {}) // newAttrs; };
|
|
|
|
|
|
/* Disable Hydra builds of given derivation.
|
|
*/
|
|
dontDistribute = drv: addMetaAttrs { hydraPlatforms = []; } drv;
|
|
|
|
|
|
/* Change the symbolic name of a package for presentation purposes
|
|
(i.e., so that nix-env users can tell them apart).
|
|
*/
|
|
setName = name: drv: drv // {inherit name;};
|
|
|
|
|
|
/* Like `setName`, but takes the previous name as an argument.
|
|
|
|
Example:
|
|
updateName (oldName: oldName + "-experimental") somePkg
|
|
*/
|
|
updateName = updater: drv: drv // {name = updater (drv.name);};
|
|
|
|
|
|
/* Append a suffix to the name of a package (before the version
|
|
part). */
|
|
appendToName = suffix: updateName (name:
|
|
let x = builtins.parseDrvName name; in "${x.name}-${suffix}-${x.version}");
|
|
|
|
|
|
/* Apply a function to each derivation and only to derivations in an attrset.
|
|
*/
|
|
mapDerivationAttrset = f: set: lib.mapAttrs (name: pkg: if lib.isDerivation pkg then (f pkg) else pkg) set;
|
|
|
|
/* Set the nix-env priority of the package.
|
|
*/
|
|
setPrio = priority: addMetaAttrs { inherit priority; };
|
|
|
|
/* Decrease the nix-env priority of the package, i.e., other
|
|
versions/variants of the package will be preferred.
|
|
*/
|
|
lowPrio = setPrio 10;
|
|
|
|
/* Apply lowPrio to an attrset with derivations
|
|
*/
|
|
lowPrioSet = set: mapDerivationAttrset lowPrio set;
|
|
|
|
|
|
/* Increase the nix-env priority of the package, i.e., this
|
|
version/variant of the package will be preferred.
|
|
*/
|
|
hiPrio = setPrio (-10);
|
|
|
|
/* Apply hiPrio to an attrset with derivations
|
|
*/
|
|
hiPrioSet = set: mapDerivationAttrset hiPrio set;
|
|
|
|
|
|
/* Check to see if a platform is matched by the given `meta.platforms`
|
|
element.
|
|
|
|
A `meta.platform` pattern is either
|
|
|
|
1. (legacy) a system string.
|
|
|
|
2. (modern) a pattern for the platform `parsed` field.
|
|
|
|
3. (functional) a predicate function returning a boolean.
|
|
|
|
We can inject these into a pattern for the whole of a structured platform,
|
|
and then match that.
|
|
*/
|
|
platformMatch = platform: elem:
|
|
if builtins.isFunction elem
|
|
then elem platform
|
|
else let
|
|
pattern =
|
|
if builtins.isString elem
|
|
then { system = elem; }
|
|
else { parsed = elem; };
|
|
in lib.matchAttrs pattern platform;
|
|
|
|
/* Check if a package is available on a given platform.
|
|
|
|
A package is available on a platform if both
|
|
|
|
1. One of `meta.platforms` pattern matches the given
|
|
platform, or `meta.platforms` is not present.
|
|
|
|
2. None of `meta.badPlatforms` pattern matches the given platform.
|
|
*/
|
|
availableOn = platform: pkg:
|
|
((!pkg?meta.platforms) || lib.any (platformMatch platform) pkg.meta.platforms) &&
|
|
lib.all (elem: !platformMatch platform elem) (pkg.meta.badPlatforms or []);
|
|
|
|
/* Get the corresponding attribute in lib.licenses
|
|
from the SPDX ID.
|
|
For SPDX IDs, see
|
|
https://spdx.org/licenses
|
|
|
|
Type:
|
|
getLicenseFromSpdxId :: str -> AttrSet
|
|
|
|
Example:
|
|
lib.getLicenseFromSpdxId "MIT" == lib.licenses.mit
|
|
=> true
|
|
lib.getLicenseFromSpdxId "mIt" == lib.licenses.mit
|
|
=> true
|
|
lib.getLicenseFromSpdxId "MY LICENSE"
|
|
=> trace: warning: getLicenseFromSpdxId: No license matches the given SPDX ID: MY LICENSE
|
|
=> { shortName = "MY LICENSE"; }
|
|
*/
|
|
getLicenseFromSpdxId =
|
|
let
|
|
spdxLicenses = lib.mapAttrs (id: ls: assert lib.length ls == 1; builtins.head ls)
|
|
(lib.groupBy (l: lib.toLower l.spdxId) (lib.filter (l: l ? spdxId) (lib.attrValues lib.licenses)));
|
|
in licstr:
|
|
spdxLicenses.${ lib.toLower licstr } or (
|
|
lib.warn "getLicenseFromSpdxId: No license matches the given SPDX ID: ${licstr}"
|
|
{ shortName = licstr; }
|
|
);
|
|
|
|
/* Get the path to the main program of a derivation with either
|
|
meta.mainProgram or pname or name
|
|
|
|
Type: getExe :: derivation -> string
|
|
|
|
Example:
|
|
getExe pkgs.hello
|
|
=> "/nix/store/g124820p9hlv4lj8qplzxw1c44dxaw1k-hello-2.12/bin/hello"
|
|
getExe pkgs.mustache-go
|
|
=> "/nix/store/am9ml4f4ywvivxnkiaqwr0hyxka1xjsf-mustache-go-1.3.0/bin/mustache"
|
|
*/
|
|
getExe = x:
|
|
"${lib.getBin x}/bin/${x.meta.mainProgram or (lib.getName x)}";
|
|
}
|